Lifting hook



March 24, 1925.

D. DAVIES LIFTING HOOK Filed Oct. 11, 1924 jnoentar: Z74 wp Dav/5,

ffiinesses Patented Mar. 24, 1925.

I Davin pawns; OHIO, nssidnonl'igo rim, AMERICAN STEE Am) {win-n oolvrianjv oFjnEw".nmsnv, eloonronarron or vnw JERSEY.

qAp-plieation filed October 11, 1924. Serial at. 743,041.

ToaZZ whomit may concernr G Be-itknownthatl, DAvrnDAvins, a citizenv-of-the United States,"and.resident of Cleveland, in the county' ofCuyahoga I and State of Ohio, have invented certain new and usefulImprovements'in Lifting Hooks, of which the following isa'specification. lhisl'inventi'on relates-to lifting mechanism and moreparticularly to-lifting hooks for liftingla plurality ofcoiled bundlesof wire, rods orthedike, andhas for one of its objects theprovision ofsuch a mechanism which may be operated by the craneman at a distance to,engage and hold :a plurality :of bundles vof-wire .or. the dike; so :asto facilitate the handlin thereof. 342 7 1.1 1 f wlAnother bject'isto-pi'ovidea hook of this class having; ,the novel arrangement,combination, construction? and desigir of ;.'-partshereinafterdescribed; and illustrated in the caccompanying drawings. LE1 -:-3

V Figure: 1 Risa: side elevation of a lifting hookf constructed inaccordance "with my in- ;vention, showing the; hook supportinga plurality; of hurdles ofwirerje @v; r-

- Figure, 2: is a Isectional elevation showing the means for locking thelifting element of the ho0k.-' i :2 Q EReferringjmore particularly tothe drawings, the numeral 2 designates-the rigid supportingbar/or?channel which' is of such length as to extend across all thematerial being lifted. A mounting block oribox 3 is secured to the upperfacevof the bar-2 intermediate theends ;thereof.=*:- i i A pair of Ushaped liftinghooks'or arms 4: and 5 areprovided'for engaging thematerial, to be lifted, and liavethe free ends of their upper legs pivotallyniounted' on. pivot 'pins'6 and 7. whichare'secured in the opposite-endsof the block 8, while their lower legs are free to enter through thehollow centers of the bundles jOfWllG, rods, etcl A lit ting element inthe form of a. bar 8,

terminating at its upper end in an eye 9 is adapted to be secured to thelifting cable 9 of acrane or the like, and is connected to the arms orhooks 4L and 5 by a pair of links 10 and 11 which havetheir inner endspiv- Iotally mounted on a pivot pin 12mounted in a vertically disposedslot 13 in the bar 8, which slot permits a limited free movement of saidbar relative to said pivot pin 12. The outer ends ofthe links 10 and-l1are pivotally'connected as at lit and 15, respectively, intermediate theends of the upper legs of the lifting hooks or arms 4::1ndf55respectively. r

The block 3 isprovided with acentra'lly arranged depression or socket'16wvl1ich flares outwardlyat its upper-end as "at'17 and is adapted to'recei've the lower the lifting element or bar 8. v Vertical movement ofthe-lifting elementor bar 8 relative to the block or box 3 will cause aswinging movement-of the armsfo'r hooks- 4 and 5 about their pivot pins6 and 7 When the element 8 is lowered the arms or hooks Land 5 willswingdownwardly through anarcuate path, due to the connecting links 10and-11, thereby-causing their lower or free legs tomove toward eachother and pass within the hollow center of 'a'row of coiled bundles ofwire, rods or the like; When the element 8 is moved upwardly relativeto'the block or box 3,-the arms -or;hooks 4:' and 5 will swing upwardlyand outwardly through an arcuate' path, thus moving out of engagementwith the material being "handled.

.A'.bell' crank lever 20 is pivotally mounted on one side-of the block 3and has a counterweight 21 secured toone end and an oper ating cable 22secured to'its other end, which 'cable'is adapted to be trained upwardlyinto Iposition to beoperated by the craneman-or other operator.

A lock pin 23 has its one end pivot-ally mounted'on a pivot pin 24.which is mounted in a slot 25 in the crank20 and itsother end mounted'inan openlng or aperture 26 which extends transversely through the box Thepin 23 is adapted to be reciprocated in the opening 26 by the rocking ofthe crank lever 20 about its pivot and to be 9 moved through theopening'28 in the lifting element 8, seats to lock said element againstmovement relative to the block or bent-3..

In operation the device is first lowered. down onto a plurality oi;bundles of wire,

rods or the like, which. are arranged in rows of suitable size, untilthe supporting bar 2 rests on top of i the bundles. Continued loweringof the lifting element 8 will then cause the arms 4 and 5 to swingdownwardly and inwardly through an a-rouate path and their free lowerlegs will enter through the hollow centers of the bundles of material.The lowering movement will be continued untilafter the hooks 4t and 5have reached their lowermost position, thus causing the lifting element8 to enterthe depression 16 and move relative to the pivot pin 12. Whenthe lifting element 8 has reachedits lowermost position, the operatorwill pull on the cable 22, thus rocking the bell cranklever 2O upwardlyand forcing the locking pin- 23 through the aperture 28 in the element8. Tension will then be applied to, the lifting element through thelifting cable 9 and the load lifted. The ,weight of the: material liftedwill serve to preventgdisengagement of the locking pin. hen it isdesired to release the load it will belowered onto a fixed supportor onthe grounddfadesired, and the cable 9 will-belowered 1 so as to permitthe lifting element to move down into the socket 16.- As the-tension isremoved fromlthe cable 9? the counterweighted bell crank lever 20 willautomatically withdraw the locking pin'23 from engagement with'thelifting element 8. After the looking pin has been withdrawn-the liftingelement 8'will be moved. upwardly so as to cause the arms 4 and '5 toswing outwardly andupwar'dly free of the load.'

' vWhile -I---have shown and described'only 'one specific formv'of myinvention it will be understood that do n'otwish to be limited thereto,since various :modifications maybe made withoutdeparting from Y thescope l'of my inventionas defined in the appendedclaims. 1

,I claim- 2 1. A lifting mechanism,-acomprising a rigid supportingmember, alpair' of substantially U-shaped material engaging? arms havingone end pivoted to saidsupporting memher and their other end beingadapted: to engage the material :to. be lifted, a lifting element, apairof;links pivotally connected to said lifting element and saidarms,whereby said arms are moved -about-theirpivotal connections withsaid supporting member when saidlifting element is moved vertical- 1yrelative to said supporting member, means for lockingsaid liftingelement against vertical movement relative to said supporting member,and means for automatically releasing said-locking means when thelifting strain is removed from said lifting element. 2. A liftingmechanism, comprising" a supporting bar adapted toengage the material tobe lifted, a mounting block secured to the upper face of said barintermediate its ends, a. pair of substantially 'uwsliaped materialengaging arm's: having one leg pivotally connected to said block andtheir other leg being adapted to engage the material to be lifted, alifting element, and a pair of links having one end'pivotallyconnectedto said arms intermediate their endsandhaving their other ends pivotallyconnected to said lifting element, whereby said; arms are moved abouttheir pivotal connections with said mounting block when said liftingelement is moved vertically relative to said mounting block.

3. A lifting mechanism, comprising a supporting bar adapted to engagethe material to be lifted, a mounting block secured to the upper face ofsaid bar intermediate its ends, a pair of substantially U-shapedmaterial engaging arms having one leg pivotally connected to said block,and their other leg being adapted to engage the ma.- terial to belifted, a lifting element, a pair of links having one end pivotallyconnected to said arms'intermediate their ends and having theirotherends pivotally connected to said lifting element, whereby said armsare moved about their pivotal connection with said mounting block whensaid lifting element is moved vertically relative to said mountingblock, and means for locking said lifting element against verticalmovement relative to said mounting block.

v l. A lifting mechanism, comprising a supporting bar adapted to engagethe material to be lifted, a mounting block secured to the upper face ofsaid bar intermediate its ends, a pair of substantially U-shapedmaterial engaging arms having one leg pivotally connected to said blockand their other leg being adapted to engage the material to be lifted, alifting-element, a pair of links having oneend pivotally connected tosaid arms intermediate theirends and having their j other ends'pivotallyconnected to said lifting element,'whereby said arms are movedabout'their pivotal connection with said mounting block when saidlifting element is moved vertically relative to said mounting block,means for locking said lifting element against vertical movementrelative to said mounting block, and means for automatically releasingsaid locking means.

5. A lifting mechanism con'iprising a rigid supporting member, a pair ofsubstantially U- shaped material engaging arms having one end pivoted tosaid supporting member and their other end being adapted to en- =gagethe material to be lifted, a lifting ele:

ment, a pair of links having one end pivoted to said arms-em termediatetheir ends and having their other ends pivotally connected to saidlifting element at a point above said rigid supporting member. wherebysaid arms are moved about their pivotal connec tions with said mountingblock when said lifting element is moved vertically relative to saidmounting block, means for locking said lifting elementagainstvertical-movement relatlve to said supporting member,

and means for automatically releasing saidlocking means.

6. A lifting mechanism, comprismgarigid supporting member, a pair-ofsubstantially U-shaped material engaging. arms having one end pivoted tosaid supporting member and their other end being adapted to engage thematerial to be lifted, a lifting element, a pair of links having one endpivoted to said arms intermediate their ends and having their otherendspivotally connected to said lifting element at a point above said rigidsupporting member, whereby said arms are moved about their pivotalconnections with said mounting block when said lifting ele- 10 ment ismoved vertically relative to said said locking means when the liftingstrain 15 is removed from said lifting element.

In testimony whereof I have hereunto set my hand.

DAVID DAVIES.

